body {
  width: 100vw;
  box-sizing: border-box;
}

.center {
  text-align: center;
}
.flex-box {
  display: flex;
  &.flex-item {
    flex: 1;
  }
}

.main {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  // width: 100vw;
}

.mg {
  margin: 20px auto;
}

.rl {
  margin: 0 20px;
}

